| Porthcawl to Centralia (Illinois) | 4,025.29 mi (6,478.08 km) |
| Porthcawl to Centralia (Washington) | 4,757.10 mi (7,655.81 km) |
| Porthcawl to Centreville (Virginia) | 3,538.53 mi (5,694.71 km) |
| Porthcawl to Ceres (California) | 5,213.15 mi (8,389.76 km) |
| Porthcawl to Cerritos (California) | 5,329.89 mi (8,577.62 km) |
| Porthcawl to Chalco (Nebraska) | 4,167.66 mi (6,707.20 km) |
| Porthcawl to Chalmette (Louisiana) | 4,478.11 mi (7,206.82 km) |
| Porthcawl to Chambersburg (Pennsylvania) | 3,499.33 mi (5,631.63 km) |
| Porthcawl to Chamblee (Georgia) | 4,051.03 mi (6,519.51 km) |
| Porthcawl to Champaign (Illinois) | 3,917.41 mi (6,304.45 km) |
| Porthcawl to Champlin (Minnesota) | 3,878.87 mi (6,242.44 km) |
| Porthcawl to Chandler (Arizona) | 5,148.14 mi (8,285.13 km) |
| Porthcawl to Chanhassen (Minnesota) | 3,899.61 mi (6,275.81 km) |
| Porthcawl to Channahon (Illinois) | 3,856.70 mi (6,206.76 km) |
| Porthcawl to Channelview (Texas) | 4,695.42 mi (7,556.55 km) |
